NCP1050P100
NCP1050, NCP1051,
NCP1052, NCP1053,
NCP1054, NCP1055
Monolithic High Voltage
Gated Oscillator Power
Switching Regulator
The NCP1050 through NCP1055 are monolithic high voltage regulators that enable end product equipment to be compliant with low standby power requirements. This device series combines the required converter functions allowing a simple and economical power system solution for office automation, consumer, and industrial products. These devices are designed to operate directly from a rectified AC line source. In flyback converter applications they are capable of providing an output power that ranges from 6.0 W to 40 W with a fixed AC input of 100 V, 115 V, or 230 V, and 3.0 W to 20 W with a variable AC input that ranges from 85 V to 265 V.
This device series features an active startup regulator circuit that eliminates the need for an auxiliary bias winding on the converter transformer, fault detector and a programmable timer for converter overload protection, unique gated oscillator configuration for extremely fast loop response with double pulse suppression, power switch current limiting, input undervoltage lockout with hysteresis, thermal shutdown, and auto restart fault detection. These devices are available in economical 8−pin dual−in−line and 4−pin SOT−223 packages.
Features
•Startup Circuit Eliminates the Need for Transformer Auxiliary Bias Winding
•Optional Auxiliary Bias Winding Override for Lowest Standby Power Applications
•Converter Output Overload and Open Loop Protection
•Auto Restart Fault Protection
•IC Thermal Fault Protection
•Unique, Dual Edge, Gated Oscillator Configuration for Extremely Fast Loop Response
•Oscillator Frequency Dithering with Controlled Slew Rate Driver for Reduced EMI
•Low Power Consumption Allowing European Blue Angel Compliance
•On−Chip 700 V Power Switch Circuit and Active Startup Circuit
•Rectified AC Line Source Operation from 85 V to 265 V
•Input Undervoltage Lockout with Hysteresis
•Oscillator Frequency Options of 44 kHz, 100 kHz, 136 kHz
Typical Applications
•AC−DC Converters
•Wall Adapters
•Portable Electronic Chargers
•Low Power Standby and Keep−Alive Supplies
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MARKING |
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DIAGRAMS |
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8 |
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DIP−8 |
NCP105XZ |
8 |
CASE 626A |
AWL |
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P SUFFIX |
YYWW |
1 |
1 |
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Pin: 1. |
VCC |
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2. |
Control Input |
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3, 7−8. Ground
4.No Connection
5.Power Switch Drain
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4 |
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4 |
SOT−223 |
N5XZ |
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CASE 318E |
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1 |
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ALYW |
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ST SUFFIX |
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1 |
Pin: 1. VCC
2.Control Input
3.Power Switch Drain
4.Ground
X |
= Current Limit (0, 1, 2, 3, 4, 5) |
Z |
= Oscillator Frequency (A, B, C) |
A |
= Assembly Location |
WL, L |
= Wafer Lot |
YY, Y |
= Year |
WW, W |
= Work Week |
ORDERING INFORMATION
See detailed ordering and shipping information on page 22 of this data sheet.
Semiconductor Components Industries, LLC, 2003 |
1 |
Publication Order Number: |
July, 2003 − Rev. 7 |
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NCP1050/D |
NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055
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AC Line |
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Snubber |
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Input |
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Converter |
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DC Output |
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5 |
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Power Switch Circuit Output |
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VCC |
Startup & VCC |
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1 |
Regulator Circuit |
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Power |
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Fault Detector |
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Switch |
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Circuit |
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Control Input |
2 |
Oscillator & |
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Gating Logic |
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Ground 3, 7−8 |
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Figure 1. Typical Application |
Pin Function Description |
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Pin |
Pin |
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(SOT−223) |
(DIP−8) |
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Function |
Description |
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1 |
1 |
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VCC |
This is the positive supply voltage input. During startup, power is supplied to this input |
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from Pin 5. When VCC reaches VCC(on), the Startup Circuit turns off and the output is |
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allowed to begin switching with 1.0 V hysteresis on the VCC pin. The capacitance |
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connected to this pin programs fault timing and frequency modulation rate. |
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2 |
2 |
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Control Input |
The Power Switch Circuit is turned off when a current greater than approximately |
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50 A is drawn out of or applied to this pin. A 10 V clamp is built onto the chip to |
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protect the device from ESD damage or overvoltage conditions. |
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4 |
3, 7, 8 |
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Ground |
This pin is the control circuit and Power Switch Circuit ground. It is part of the |
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integrated circuit lead frame. |
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4 |
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No Connection |
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3 |
5 |
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Power Switch |
This pin is designed to directly drive the converter transformer primary, and internally |
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Drain |
connects to Power Switch and Startup Circuit. |
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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055
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+ |
AC Line |
+ |
Snubber |
+ |
Input |
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Converter |
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DC Output |
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Power Switch Circuit Output |
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VCC |
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Startup |
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+ |
Startup/VCC Reg |
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Circuit |
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10 V |
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Fault |
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− |
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Internal |
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VCC Bypass/ |
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Detector |
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Bias |
7.5/8.5 V |
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Fault Timing/ |
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S |
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Fault |
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VCO Sweep |
Undervoltage |
Thermal |
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Latch |
Power |
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Control |
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Shutdown |
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Q |
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Switch |
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Lockout |
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Circuit |
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− |
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R |
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Driver |
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+ |
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+ |
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4.5 V |
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VCC |
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Oscillator |
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IH = 10 A |
Turn On |
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48 A |
Latch |
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R |
Turn Off |
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Latch |
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+ |
Q |
Ck |
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2.6 V |
S |
Q |
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Control |
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R |
Input |
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10 V |
+ |
Leading Edge |
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Blanking |
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− |
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3.3 V |
+ |
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Current Limit |
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Comparator |
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IH = 10 A |
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RSENSE |
48 |
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A |
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Ground
Figure 2. Representative Block Diagram
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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055
fOSC (high)
8.5 V
VCC |
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fOSC (low) |
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7.5 V |
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Oscillator Duty |
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Cycle |
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Oscillator Clock |
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47.5 A |
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37.5 A |
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ICONTROL, SINK |
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0 A |
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Leading Edge On |
Leading Edge On |
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Leading Edge On |
Feedback Off |
Duty Cycle Off |
Leading Edge On |
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Duty Cycle Off |
Delay On |
No Second |
Current Limit Off |
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Duty Cycle Off |
Pulse |
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Power Switch
Circuit Gate Drive
Current Limit
Threshold
Primary Current
Current Limit
Propagation
Delay
Figure 3. Timing Diagram for Gated Oscillator with Dual Edge PWM
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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055
ICC1, Current Measurement
ICC2, Current Measurement
VCC(on)
Hysteretic Regulation
VCC(off)
VCC
VCC(reset)
ICC3, Current Measurement
0 V
6.3 mA
I(start)
0 mA
ICC1 |
ICC2 |
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ICC |
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ICC3 |
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0 mA |
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I(start) |
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47.5 A |
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37.5 A |
ICONTROL, SINK
0 A
V(pin 5)
Fault Applied |
Fault Removed |
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Figure 4. Non−Latching Fault Condition Timing Diagram
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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055
MAXIMUM RATINGS (Note 1)
Rating |
Symbol |
Value |
Unit |
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Power Switch and Startup Circuit |
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Drain Voltage Range |
VDS |
0.3 to 700 |
V |
Drain Current Peak During Transformer Saturation |
IDS(pk) |
2.0 Ilim Max |
A |
Power Supply/VCC Bypass and Control Input |
VIR |
0.3 to 10 |
V |
Voltage Range |
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Current |
Imax |
100 |
mA |
Thermal Characteristics |
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°C/W |
P Suffix, Plastic Package Case 626A−01 |
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Junction−to−Lead |
R JL |
9.0 |
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Junction−to−Air, 2.0 Oz. Printed Circuit Copper Clad |
R JA |
77 |
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0.36 Sq. Inch |
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1.0 Sq. Inch |
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60 |
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ST Suffix, Plastic Package Case 318E−04 |
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Junction−to−Lead |
R JL |
14 |
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Junction−to−Air, 2.0 Oz. Printed Circuit Copper Clad |
R JA |
74 |
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0.36 Sq. Inch |
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1.0 Sq. Inch |
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55 |
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Operating Junction Temperature |
TJ |
40 to +150 |
°C |
Storage Temperature |
Tstg |
65 to +150 |
°C |
1.Maximum Ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute maximum−rated conditions is not implied. Functional operation should be restricted to the Recommended Operating Conditions.
A.This device series contains ESD protection and exceeds the following tests: Pins 1−3: Human Body Model 2000 V per MIL−STD−883, Method 3015.
Machine Model Method 400 V.
Pin 5: Human Body Model 1000 V per MIL−STD−883, Method 3015. Machine Model Method 400 V.
Pin 5 is connected to the power switch and start−up circuits, and is rated only to the max voltage of the part, or 700 V.
B.This device contains Latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.
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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055
ELECTRICAL CHARACTERISTICS (VCC = 8.0 V, for typical values TJ = 25°C, for min/max values, TJ is the operating junction temperature range that applies (Note 2), unless otherwise noted.)
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Characteristics |
Symbol |
Min |
Typ |
Max |
Unit |
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OSCILLATOR |
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Frequency (VCC = 7.5 V) |
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fOSC(low) |
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kHz |
TJ = 25°C: |
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A Suffix Device |
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38 |
42.5 |
47 |
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B Suffix Device |
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87 |
97 |
107 |
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C Suffix Device |
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119 |
132 |
145 |
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TJ = Tlow to Thigh |
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A Suffix Device |
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37 |
− |
47 |
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B Suffix Device |
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84 |
− |
107 |
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C Suffix Device |
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113 |
− |
145 |
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Frequency (VCC = 8.5 V) |
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fOSC(high) |
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kHz |
TJ = 25°C: |
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41 |
45.5 |
50 |
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A Suffix Device |
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B Suffix Device |
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93 |
103 |
113 |
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C Suffix Device |
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126 |
140 |
154 |
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TJ = Tlow to Thigh |
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A Suffix Device |
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39 |
− |
50 |
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B Suffix Device |
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90 |
− |
113 |
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C Suffix Device |
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120 |
− |
154 |
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Frequency Sweep (VCC = 7.5 V to 8.5 V, TJ = 25°C) |
%fOSC |
− |
5.0 |
− |
% |
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Maximum Duty Cycle |
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D(max) |
74 |
77 |
80 |
% |
CONTROL INPUT |
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Lower Window Input Current Threshold |
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A |
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Switching Enabled, Sink Current Increasing |
Ioff(low) |
−58 |
−47.5 |
−37 |
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Switching Disabled, Sink Current Decreasing |
Ion(low) |
−50 |
−37.5 |
−25 |
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Upper Window Input Current Threshold |
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Switching Enabled, Source Current Increasing |
Ioff(high) |
37 |
47.5 |
58 |
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Switching Disabled, Source Current Decreasing |
Ion(high) |
25 |
37.5 |
50 |
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Control Window Input Voltage |
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V |
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Lower (Isink = 25 A) |
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Vlow |
1.1 |
1.35 |
1.6 |
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Upper (Isource = 25 A) |
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Vhigh |
4.2 |
4.6 |
5.0 |
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2. Tested junction temperature range for the NCP105X series: |
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Tlow = −40 °C |
Thigh = +125°C |
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NCP1050, NCP1051, NCP1052, NCP1053, NCP1054, NCP1055
ELECTRICAL CHARACTERISTICS (VCC = 8.0 V, for typical values TJ = 25°C, for min/max values, TJ is the operating junction temperature range that applies (Note 3), unless otherwise noted.)
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Characteristics |
Symbol |
Min |
Typ |
Max |
Unit |
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POWER SWITCH CIRCUIT |
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Power Switch Circuit On−State Resistance |
RDS(on) |
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NCP1050, NCP1051, NCP1052 (ID = 50 mA) |
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TJ = 25°C |
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− |
22 |
30 |
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TJ = 125°C |
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− |
42 |
55 |
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NCP1053, NCP1054, NCP1055 (ID = 100 mA) |
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TJ = 25°C |
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− |
10 |
15 |
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TJ = 125°C |
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− |
23 |
28 |
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Power Switch Circuit & Startup Breakdown Voltage |
V(BR)DS |
700 |
− |
− |
V |
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(ID(off) = 100 A, TA = 25°C) |
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Power Switch Circuit & Startup Circuit Off−State Leakage Current |
IDS(off) |
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A |
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(VDS = 650 V) TJ = 25°C |
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− |
25 |
40 |
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TJ = 125°C |
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15 |
80 |
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Switching Characteristics (RL = 50 , VDS set for ID = 0.7 IIim) |
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ns |
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Turn−on Time (90% to 10%) |
ton |
− |
20 |
− |
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Turn−off Time (10% to 90%) |
toff |
− |
10 |
− |
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CURRENT LIMIT AND THERMAL PROTECTION |
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Current Limit Threshold (TJ = 25°C) (Note 6) |
Ilim |
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mA |
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NCP1050 |
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93 |
100 |
107 |
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NCP1051 |
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186 |
200 |
214 |
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NCP1052 |
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279 |
300 |
321 |
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NCP1053 |
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372 |
400 |
428 |
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NCP1054 |
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493 |
530 |
567 |
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NCP1055 |
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632 |
680 |
728 |
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Conversion Power Deviation (T = 25°C) (Note 7) |
I2f |
− |
0 |
10 |
%A2Hz |
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J |
OSC |
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Propagation Delay, Current Limit Threshold to Power Switch Circuit Output |
tPLH |
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ns |
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NCP1050, NCP1051, NCP1052 |
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135 |
− |
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NCP1053, NCP1054, NCP1055 |
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− |
160 |
− |
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Thermal Protection (VCC = 8.6 V) (Note 3, 4, 5) |
Tsd |
140 |
160 |
− |
°C |
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Shutdown (Junction Temperature Increasing) |
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Hysteresis (Junction Temperature Decreasing) |
TH |
− |
75 |
− |
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STARTUP CONTROL |
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Startup/VCC Regulation |
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V |
Startup Threshold/VCC Regulation Peak (VCC Increasing) |
VCC(on) |
8.0 |
8.5 |
9.0 |
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Minimum Operating/VCC Valley Voltage After Turn−On |
VCC(off) |
7.0 |
7.5 |
8.0 |
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Hysteresis |
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VH |
− |
1.0 |
− |
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Undervoltage Lockout Threshold Voltage, VCC Decreasing |
VCC(reset) |
4.0 |
4.5 |
5.0 |
V |
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Startup Circuit Output Current (Power Switch Circuit Output = 40 V) |
Istart |
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mA |
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VCC = 0 V |
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TJ = 25°C |
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5.4 |
6.3 |
7.2 |
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TJ = −40 to 125 °C |
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4.5 |
− |
8.0 |
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VCC = VCC(on) − 0.2 V |
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TJ = 25°C |
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4.6 |
5.6 |
6.6 |
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TJ = −40 to 125 °C |
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3.5 |
− |
7.0 |
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Minimum Start−up Drain Voltage (I start = 0.5 mA, VCC = VCC(on) − 0.2 V) |
Vstart(min) |
− |
13.4 |
20 |
V |
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Output Fault Condition Auto Restart |
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(VCC Capacitor = 10 F, Power Switch Circuit Output = 40 V) |
Drst |
− |
6.0 |
− |
% |
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Average Switching Duty Cycle |
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Frequency |
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frst |
− |
3.5 |
− |
Hz |
3. Tested junction temperature range for the NCP105X series: |
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Tlow = −40 °C |
Thigh = +125°C |
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4.Maximum package power dissipation limits must be observed.
5.Guaranteed by design only.
6.Adjust di/dt to reach Ilim in 4.0 sec.
7.Consult factory for additional options including test and trim for output power accuracy.
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